Closed Bug 1315098 Opened 4 years ago Closed 2 years ago

Firefox causing constant fan spin with big pauses, and high GC/CC


(Core :: XPCOM, defect, P3)

52 Branch





(Reporter: bullionareboy, Unassigned)


(Blocks 1 open bug)


(Keywords: perf, Whiteboard: [qf:investigate][MemShrink:P3])


(1 file)

I've got this super annoying Fan spinning issue.
The fan starts spinning noisily and slow and repeats the process.
From what i could read its been going on for a long time but I'm not sure if its the same
Its caused due to mouse Polling or so. 
Funny thing is i don't seem to have noticed it in the stable Ubuntu distro shipped Firefox(49.0.2) 


64bit, 4GB ram, Intel i3, Ubuntu 16.04 LTS 
Nightly 52.0a1 (2016-11-02) (64-bit) fresh new profile
Mouse - Logitech M100r
I had not closed the browser for around a days time so the effect is more pronounced
Easily triggered while scrolling YouTube homepage 

Here's the about:memory files:
I've got the log's(GC & CC) saved - can upload if required. 

about:performance says this for now: 
Process ID 

Resident Set Size 
1.0 GB 
827 MB

Unique Set Size 
946 MB
801 MB

about:performance for the tabs:
Full name: (as window 4294985552).
Impact on framerate: 8/10.
CPU usage: 14%.
System usage: 1%.
Blocking process calls: 0%.
Measure start: 20 seconds ago.
Processes: 15510 (child)

Full name: (as window 4294985585).
Impact on framerate: 9/10.
CPU usage: 2%.
System usage: 1%.
Blocking process calls: 0%.
Measure start: 30 seconds ago.
Processes: 15510 (child)

Full name: (as window 4294985621).
Impact on framerate: 9/10.
CPU usage: 20%.
System usage: 2%.
Blocking process calls: 0%.
Measure start: 25 seconds ago.
Processes: 15510 (child)
Component: Untriaged → Memory Allocator
Product: Firefox → Core
This sounds a lot like bug 508427.
Component: Memory Allocator → XPCOM
(In reply to Mike Hommey [:glandium] from comment #1)
> This sounds a lot like bug 508427.

Yes, while trying to find a solution i was ending up with similar Polling issues related bug  

Didn't know which is the correct issue. 
Its still a mystery why the fan has to constantly turn on and off.
I've got a dual gpu fwiw: Intel + Nvidia
But the problem also occurs with Nvidia completely disabled
I think I've got better data to help investigate. It was frustrating even to collect data with the browser locking up frequently during data collection 
As this issue continues to happen its leading to more & more e10s spinners
Locking up the brower and Ubuntu OS - the whole screen goes to that fade to black mode.

Process ID 	Resident Set Size 	Unique Set Size
14412		2.6 GB			2.6 GB
Parent		511 MB			460 MB


Problem Specific Selection:,1,2,3,4,5,6,7,8,9,29,30,31,32,33,34,3810

about:performance tabs slowing down:
Facebook may currently be slowing down Nightly.less

    Full name: (as window 2147494248).
    Impact on framerate: 9/10.
    CPU usage: 7%.
    System usage: 1%.
    Blocking process calls: 0%.
    Measure start: 39 seconds ago.
    Processes: 14412 (child)

about:performance may currently be slowing down Nightly.less

    Full name: [System Principal], about:performance (as window 506).
    Impact on framerate: 7/10.
    CPU usage: 2%.
    System usage: 1%.
    Blocking process calls: 0%.
    Measure start: 39 seconds ago.
    Processes: 14332 (parent)

YouTube may currently be slowing down Nightly.less
    Full name: (as window 2147494263).
    Impact on framerate: 6/10.
    CPU usage: 1%.
    System usage: 1%.
    Blocking process calls: 0%.
    Measure start: 39 seconds ago.
    Processes: 14412 (child)

Seems like this gets easily triggered after a about a day of browsing and letting the system hibernate/standby(close lid of laptop) while leaving Firefox running.  
Once I login(open lid) into my Ubuntu system, Firefox then starts acting up.
Whiteboard: [qf] → [qf:investigate]
So, as you say, we're spending a lot of time trying to reclaim memory with garbage / cycle collection.

Hey mccr8... is the memory report at illuminating at all?
Flags: needinfo?(continuation)
There's certainly something weird going on. There's only one content process, and it has a memory report like this:
2,155.55 MB (100.0%) -- explicit
├──2,095.21 MB (97.20%) ── heap-unclassified
├─────57.53 MB (02.67%) -- heap-overhead
│     ├──34.03 MB (01.58%) ── bookkeeping
│     ├──22.69 MB (01.05%) ── bin-unused
│     └───0.80 MB (00.04%) ── page-cache
└──────2.82 MB (00.13%) ++ (5 tiny)

That's it! The tiny part shows a few ghost windows and some preferences stuff, but little else. I think the memory reporters are fairly async, so maybe the CPU is so bogged down they mostly did not complete. I really doubt there's zero JS.

The parent process is less odd looking but it also has a good amount of heap-unclassified:
  424.49 MB (60.59%) ── heap-unclassified
Flags: needinfo?(continuation)
Whiteboard: [qf:investigate] → [qf:investigate][MemShrink]
This doesn't seem to be memshrink issue (other than a weird memory report).
Whiteboard: [qf:investigate][MemShrink] → [qf:investigate]
Im adding another profile -
Apart from the fan spin i see the dreaded spinner yet again.  

Usage includes: freecodecamp, reddit, youtube, twitter
Despite this being an unsymbolicated profile (so it's missing details), the pseudostack entries show long CC pauses here again.

Hey bull500, sorry if we've already gone over this, but what add-ons do you have enabled?
Flags: needinfo?(bullionareboy)
(In reply to Mike Conley (:mconley) - Digging out of needinfo / review backlog. from comment #9)
> Despite this being an unsymbolicated profile (so it's missing details), the
> pseudostack entries show long CC pauses here again.

Is there anything additional you want me to log/submit? I can do so if its not super hard.

> Hey bull500, sorry if we've already gone over this, but what add-ons do you
> have enabled?

ATM i do have a few enabled; previous profiles were without addons tho  
Gecko Profile, Pulse(TestPilot), TestPilot, Video DownloadHelper, VivaldiFox
Flags: needinfo?(bullionareboy)
Another one with all extensions disabled -
(In reply to bull500 from comment #11)
> Another one with all extensions disabled -

This one has symbols, so that's good. These big pauses (wow, 5s!!) are GC and CC.

Can you please post your about:support?
Flags: needinfo?(bullionareboy)
Application Basics

Name: Firefox
Version: 56.0a1
Build ID: 20170717100212
Update Channel: nightly
User Agent: Mozilla/5.0 (X11; Linux x86_64; rv:56.0) Gecko/20100101 Firefox/56.0
OS: Linux 4.4.0-43-generic
Multiprocess Windows: 1/1 (Enabled by default)
Stylo: false (disabled by default)
Google Key: Found
Mozilla Location Service Key: Found
Safe Mode: false

Crash Reports for the Last 3 Days

Report ID: bp-c571cd11-6d97-4dd5-b289-2a42b0170714
Submitted: 3 days ago

Report ID: bp-b8db2fc6-334f-4cd6-89e7-f6ec10170714
Submitted: 3 days ago

Report ID: bp-46a1ba59-455f-4231-8c8f-2055d0170714
Submitted: 3 days ago

All Crash Reports

Nightly Features

Name: Activity Stream
Version: 0.0.0

Name: Application Update Service Helper
Version: 2.0

Name: Click-to-Play staged rollout
Version: 1.2

Name: Firefox Screenshots
Version: 10.5.0

Name: FlyWeb
Version: 1.0.0

Name: Follow-on Search Telemetry
Version: 0.9.1

Name: Form Autofill
Version: 1.0

Name: Multi-process staged rollout
Version: 1.80

Name: Photon onboarding
Version: 0.1

Name: Pocket
Version: 1.0.5

Name: Presentation
Version: 1.0.0

Name: Shield Recipe Client
Version: 55

Name: Web Compat
Version: 1.1

Name: WebCompat Reporter
Version: 1.0.0


Name: Gecko Profiler
Version: 0.17
Enabled: true

Name: Pulse
Version: 1.1.2
Enabled: false

Name: Test Pilot
Version: 1.1.3-dev-ba83fba
Enabled: false
ID: @testpilot-addon

Name: Ubuntu Modifications
Version: 3.2
Enabled: false

Name: Video DownloadHelper
Version: 6.3.1
Enabled: false
ID: {b9db16a4-6edc-47ec-a1f4-b86292ed211d}

Name: VivaldiFox
Version: 1.4.1
Enabled: false
ID: @vivaldi-fox


Compositing: Basic
Asynchronous Pan/Zoom: wheel input enabled; scrollbar drag enabled
WebGL 1 Driver WSI Info: GLX 1.4 GLX_VENDOR(client): Mesa Project and SGI GLX_VENDOR(server): SGI Extensions: GLX_ARB_create_context GLX_ARB_create_context_profile GLX_ARB_create_context_robustness GLX_ARB_fbconfig_float GLX_ARB_framebuffer_sRGB GLX_ARB_get_proc_address GLX_ARB_multisample GLX_EXT_import_context GLX_EXT_visual_info GLX_EXT_visual_rating GLX_EXT_fbconfig_packed_float GLX_EXT_framebuffer_sRGB GLX_EXT_create_context_es2_profile GLX_EXT_create_context_es_profile GLX_MESA_copy_sub_buffer GLX_MESA_multithread_makecurrent GLX_MESA_query_renderer GLX_MESA_swap_control GLX_OML_swap_method GLX_OML_sync_control GLX_SGI_make_current_read GLX_SGI_swap_control GLX_SGI_video_sync GLX_SGIS_multisample GLX_SGIX_fbconfig GLX_SGIX_pbuffer GLX_SGIX_visual_select_group GLX_EXT_texture_from_pixmap GLX_INTEL_swap_event
WebGL 1 Driver Renderer: Intel Open Source Technology Center -- Mesa DRI Intel(R) Sandybridge Mobile
WebGL 1 Driver Version: 3.0 Mesa 12.0.6
WebGL 1 Driver Extensions: GL_ARB_multisample GL_EXT_abgr GL_EXT_bgra GL_EXT_blend_color GL_EXT_blend_minmax GL_EXT_blend_subtract GL_EXT_copy_texture GL_EXT_polygon_offset GL_EXT_subtexture GL_EXT_texture_object GL_EXT_vertex_array GL_EXT_compiled_vertex_array GL_EXT_texture GL_EXT_texture3D GL_IBM_rasterpos_clip GL_ARB_point_parameters GL_EXT_draw_range_elements GL_EXT_packed_pixels GL_EXT_point_parameters GL_EXT_rescale_normal GL_EXT_separate_specular_color GL_EXT_texture_edge_clamp GL_SGIS_generate_mipmap GL_SGIS_texture_border_clamp GL_SGIS_texture_edge_clamp GL_SGIS_texture_lod GL_ARB_framebuffer_sRGB GL_ARB_multitexture GL_EXT_framebuffer_sRGB GL_IBM_multimode_draw_arrays GL_IBM_texture_mirrored_repeat GL_3DFX_texture_compression_FXT1 GL_ARB_texture_cube_map GL_ARB_texture_env_add GL_ARB_transpose_matrix GL_EXT_blend_func_separate GL_EXT_fog_coord GL_EXT_multi_draw_arrays GL_EXT_secondary_color GL_EXT_texture_env_add GL_EXT_texture_filter_anisotropic GL_EXT_texture_lod_bias GL_INGR_blend_func_separate GL_NV_blend_square GL_NV_light_max_exponent GL_NV_texgen_reflection GL_NV_texture_env_combine4 GL_S3_s3tc GL_SUN_multi_draw_arrays GL_ARB_texture_border_clamp GL_ARB_texture_compression GL_EXT_framebuffer_object GL_EXT_texture_compression_s3tc GL_EXT_texture_env_combine GL_EXT_texture_env_dot3 GL_MESA_window_pos GL_NV_packed_depth_stencil GL_NV_texture_rectangle GL_ARB_depth_texture GL_ARB_occlusion_query GL_ARB_shadow GL_ARB_texture_env_combine GL_ARB_texture_env_crossbar GL_ARB_texture_env_dot3 GL_ARB_texture_mirrored_repeat GL_ARB_window_pos GL_EXT_stencil_two_side GL_EXT_texture_cube_map GL_NV_depth_clamp GL_APPLE_packed_pixels GL_APPLE_vertex_array_object GL_ARB_draw_buffers GL_ARB_fragment_program GL_ARB_fragment_shader GL_ARB_shader_objects GL_ARB_vertex_program GL_ARB_vertex_shader GL_ATI_draw_buffers GL_ATI_texture_env_combine3 GL_ATI_texture_float GL_EXT_shadow_funcs GL_EXT_stencil_wrap GL_MESA_pack_invert GL_NV_primitive_restart GL_ARB_depth_clamp GL_ARB_fragment_program_shadow GL_ARB_half_float_pixel GL_ARB_occlusion_query2 GL_ARB_point_sprite GL_ARB_shading_language_100 GL_ARB_sync GL_ARB_texture_non_power_of_two GL_ARB_vertex_buffer_object GL_ATI_blend_equation_separate GL_EXT_blend_equation_separate GL_OES_read_format GL_ARB_color_buffer_float GL_ARB_pixel_buffer_object GL_ARB_texture_compression_rgtc GL_ARB_texture_float GL_ARB_texture_rectangle GL_EXT_packed_float GL_EXT_pixel_buffer_object GL_EXT_texture_compression_dxt1 GL_EXT_texture_compression_rgtc GL_EXT_texture_rectangle GL_EXT_texture_sRGB GL_EXT_texture_shared_exponent GL_ARB_framebuffer_object GL_EXT_framebuffer_blit GL_EXT_framebuffer_multisample GL_EXT_packed_depth_stencil GL_APPLE_object_purgeable GL_ARB_vertex_array_object GL_ATI_separate_stencil GL_EXT_draw_buffers2 GL_EXT_draw_instanced GL_EXT_gpu_program_parameters GL_EXT_texture_array GL_EXT_texture_integer GL_EXT_texture_sRGB_decode GL_EXT_timer_query GL_OES_EGL_image GL_AMD_performance_monitor GL_ARB_copy_buffer GL_ARB_depth_buffer_float GL_ARB_draw_instanced GL_ARB_half_float_vertex GL_ARB_instanced_arrays GL_ARB_map_buffer_range GL_ARB_texture_rg GL_ARB_texture_swizzle GL_ARB_vertex_array_bgra GL_EXT_texture_swizzle GL_EXT_vertex_array_bgra GL_NV_conditional_render GL_AMD_draw_buffers_blend GL_AMD_seamless_cubemap_per_texture GL_ARB_ES2_compatibility GL_ARB_blend_func_extended GL_ARB_debug_output GL_ARB_draw_buffers_blend GL_ARB_draw_elements_base_vertex GL_ARB_explicit_attrib_location GL_ARB_fragment_coord_conventions GL_ARB_provoking_vertex GL_ARB_sample_shading GL_ARB_sampler_objects GL_ARB_seamless_cube_map GL_ARB_shader_texture_lod GL_ARB_texture_cube_map_array GL_ARB_texture_gather GL_ARB_texture_multisample GL_ARB_texture_query_lod GL_ARB_texture_rgb10_a2ui GL_ARB_uniform_buffer_object GL_ARB_vertex_type_2_10_10_10_rev GL_EXT_provoking_vertex GL_EXT_texture_snorm GL_MESA_texture_signed_rgba GL_NV_texture_barrier GL_ARB_get_program_binary GL_ARB_robustness GL_ARB_separate_shader_objects GL_ARB_shader_bit_encoding GL_ARB_timer_query GL_ANGLE_texture_compression_dxt3 GL_ANGLE_texture_compression_dxt5 GL_ARB_compressed_texture_pixel_storage GL_ARB_internalformat_query GL_ARB_map_buffer_alignment GL_ARB_shading_language_420pack GL_ARB_shading_language_packing GL_ARB_texture_storage GL_EXT_framebuffer_multisample_blit_scaled GL_EXT_transform_feedback GL_AMD_shader_trinary_minmax GL_ARB_ES3_compatibility GL_ARB_arrays_of_arrays GL_ARB_clear_buffer_object GL_ARB_copy_image GL_ARB_explicit_uniform_location GL_ARB_invalidate_subdata GL_ARB_program_interface_query GL_ARB_texture_query_levels GL_ARB_texture_storage_multisample GL_ARB_vertex_attrib_binding GL_KHR_debug GL_KHR_robustness GL_ARB_buffer_storage GL_ARB_clear_texture GL_ARB_internalformat_query2 GL_ARB_multi_bind GL_ARB_seamless_cubemap_per_texture GL_ARB_shader_draw_parameters GL_ARB_texture_mirror_clamp_to_edge GL_ARB_vertex_type_10f_11f_11f_rev GL_EXT_shader_integer_mix GL_INTEL_performance_query GL_ARB_clip_control GL_ARB_conditional_render_inverted GL_ARB_cull_distance GL_ARB_get_texture_sub_image GL_ARB_pipeline_statistics_query GL_ARB_texture_barrier GL_EXT_polygon_offset_clamp GL_KHR_context_flush_control
WebGL 1 Extensions: ANGLE_instanced_arrays EXT_blend_minmax EXT_color_buffer_half_float EXT_frag_depth EXT_sRGB EXT_shader_texture_lod EXT_texture_filter_anisotropic EXT_disjoint_timer_query MOZ_debug OES_element_index_uint OES_standard_derivatives OES_texture_float OES_texture_float_linear OES_texture_half_float OES_texture_half_float_linear OES_vertex_array_object WEBGL_color_buffer_float WEBGL_compressed_texture_etc WEBGL_compressed_texture_s3tc WEBGL_compressed_texture_s3tc_srgb WEBGL_debug_renderer_info WEBGL_debug_shaders WEBGL_depth_texture WEBGL_draw_buffers WEBGL_lose_context MOZ_WEBGL_lose_context MOZ_WEBGL_compressed_texture_s3tc MOZ_WEBGL_depth_texture
WebGL 2 Driver WSI Info: -
WebGL 2 Driver Renderer: WebGL creation failed: * WebGL 2 requires support for the following features: transform_feedback2 * Exhausted GL driver options.
WebGL 2 Driver Version: -
WebGL 2 Driver Extensions: -
WebGL 2 Extensions: -
Audio Backend: pulse-rust
GPU #1
Active: Yes
Description: Intel Open Source Technology Center -- Mesa DRI Intel(R) Sandybridge Mobile
Vendor ID: Intel Open Source Technology Center
Device ID: Mesa DRI Intel(R) Sandybridge Mobile
Driver Version: 3.0 Mesa 12.0.6

AzureCanvasAccelerated: 0
AzureCanvasBackend: skia
AzureContentBackend: skia
AzureFallbackCanvasBackend: none
CairoUseXRender: 0
Device Reset: Trigger Device Reset
Decision Log
blocked by default: Acceleration blocked by platform
unavailable by default: Hardware compositing is disabled
opt-in by default: WebRender is an opt-in feature

Important Modified Preferences

accessibility.typeaheadfind.flashBar: 0
browser.cache.disk.filesystem_reported: 1
browser.cache.disk.hashstats_reported: 1
browser.cache.disk.smart_size.first_run: false
browser.cache.disk.smart_size.use_old_max: false
browser.cache.frecency_experiment: 1 true
browser.places.smartBookmarksVersion: 8
browser.sessionstore.upgradeBackup.latestBuildID: 20170717100212
browser.startup.homepage: about:home
browser.startup.homepage_override.buildID: 20170717100212
browser.startup.homepage_override.mstone: 56.0a1
browser.urlbar.daysBeforeHidingSuggestionsPrompt: 3
browser.urlbar.lastSuggestionsPromptDate: 20161203
browser.urlbar.searchSuggestionsChoice: true
browser.urlbar.usepreloadedtopurls.enabled: false
browser.urlbar.userMadeSearchSuggestionsChoice: true
dom.ipc.processCount.web: 4
dom.push.userAgentID: 0005bfc3d3b4451a86eac6f3ac08e4f4
extensions.lastAppVersion: 56.0a1
font.internaluseonly.changed: false
general.autoScroll: true
media.eme.enabled: true
media.gmp-gmpopenh264.abi: x86_64-gcc3
media.gmp-gmpopenh264.lastUpdate: 1478078352
media.gmp-gmpopenh264.version: 1.6
media.gmp-manager.buildID: 20170717100212
media.gmp-manager.lastCheck: 1500293818
media.gmp-widevinecdm.abi: x86_64-gcc3
media.gmp-widevinecdm.lastUpdate: 1478093308
media.gmp-widevinecdm.version: 1
network.cookie.prefsMigrated: true
network.predictor.cleaned-up: true
places.database.lastMaintenance: 1499776457
places.history.expiration.transient_current_max_pages: 56369
plugin.disable_full_page_plugin_for_types: application/pdf
plugin.importedState: true
plugin.state.flash: 0
print.print_bgcolor: false
print.print_bgimages: false
print.print_duplex: 0
print.print_evenpages: true
print.print_in_color: true
print.print_margin_bottom: 0.5
print.print_margin_left: 0.5
print.print_margin_right: 0.5
print.print_margin_top: 0.5
print.print_oddpages: true
print.print_orientation: 0
print.print_page_delay: 50
print.print_paper_data: 0
print.print_paper_height: 11.69
print.print_paper_name: iso_a4
print.print_paper_size_unit: 0
print.print_paper_width: 8.27
print.print_scaling: 1.00
print.print_shrink_to_fit: true
print.print_to_file: false
print.print_unwriteable_margin_bottom: 56
print.print_unwriteable_margin_left: 25
print.print_unwriteable_margin_right: 25
print.print_unwriteable_margin_top: 25
storage.vacuum.last.index: 1
storage.vacuum.last.places.sqlite: 1499598575
storage.vacuum.last.queue.sqlite: 1485779090

Important Locked Preferences

Places Database


Incremental GC: true


Activated: false
Prevent Accessibility: 0

Library Versions

Expected minimum version: 4.16 Beta
Version in use: 4.16 Beta

Expected minimum version: 3.32 Beta
Version in use: 3.32 Beta

Expected minimum version: 3.32 Beta
Version in use: 3.32 Beta

Expected minimum version: 3.32 Beta
Version in use: 3.32 Beta

Expected minimum version: 3.32 Beta
Version in use: 3.32 Beta

Experimental Features

Name: Animated Image Discarding Nightly 55
Description: Measures the impact of enabling animate image discarding in Firefox Nightly 55
Active: false
End Date: 1494761126981
Branch: disabled

Name: Intersection Observer API
Description: Measures the impact of enabling the Intersection Observer API in Firefox
Active: false
End Date: 1491264000028
Branch: enabled


Seccomp-BPF (System Call Filtering): true
Seccomp Thread Synchronization: true
User Namespaces: true
Content Process Sandboxing: true
Media Plugin Sandboxing: true
Content Process Sandbox Level: 2
Effective Content Process Sandbox Level: 2

Rejected System Calls
Flags: needinfo?(bullionareboy)
Hm. Nothing particularly suspicious there.

Next time this occurs, can you go to about:memory, and click "Minimize memory usage" a few times to see if the behaviour changes?
Flags: needinfo?(bullionareboy)
(In reply to Mike Conley (:mconley) - Digging out of needinfo / review backlog. from comment #14)
> Hm. Nothing particularly suspicious there.
> Next time this occurs, can you go to about:memory, and click "Minimize
> memory usage" a few times to see if the behaviour changes?

a real bad hang 
none of links even started loading at this stage  

After the hang

Minimize the memory didnt have any effect  
It slowly led to a hang. The UI being responsive but none of the websites were loading content after typing the URL's in fresh new tabs

Memory reports here :
MM-memory minimize 
A-after B-before
Flags: needinfo?(bullionareboy)
So it sounds like a leak to me then. Looking at the attached memory report, for example, I see ~500MB of memory associated with detached windows.
(In reply to Eric Rahm [:erahm] (please no mozreview requests) from comment #7)
> This doesn't seem to be memshrink issue (other than a weird memory report).

This is starting to feel like a pretty serious leak that bull500 can hit reliably. Are we sure this isn't MemShrink-y?
Flags: needinfo?(erahm)
This is real easy to reproduce.  
Having, twitter, outlook, reddit and youtube opened and closed or left in background can easily trigger. 
Freecodecamp does seem like a heavy site similar to CodeAcademy where the performance of Firefox takes a dip; so having one of these coding sites open does the job of reproducing the error without much effort.  
Otherwise it takes a tad bit longer to reach this state of problem  

My ubuntu system monitor states
Webcontent at 1.8GB-2GB running for about - 06:58:16
Firefox at 490MB-600MB running for about - 07:45:30 (not sure on the runtime accuracy)
There are ton of detached windows and 2 ghost windows (I usually blame addons for that).

> 2,064.42 MB (100.0%) -- explicit
> ├────998.54 MB (48.37%) -- window-objects
> │    ├──495.46 MB (24.00%) -- top(none)
> │    │  ├──493.05 MB (23.88%) -- detached
> │    │  │  ├──173.16 MB (08.39%) ++ (215 tiny)
> │    │  │  ├───41.54 MB (02.01%) ++ window(<anonymized-4294970049>)
> │    │  │  ├───30.22 MB (01.46%) ++ window(<anonymized-4294967794>)
> │    │  │  ├───29.96 MB (01.45%) ++ window(<anonymized-4294967799>)
> │    │  │  ├───28.75 MB (01.39%) ++ window(<anonymized-4294969327>)
> │    │  │  ├───26.42 MB (01.28%) ++ window(<anonymized-4294967299>)
> │    │  │  ├───25.15 MB (01.22%) ++ window(<anonymized-4294968184>)
> │    │  │  ├───24.95 MB (01.21%) ++ window(<anonymized-4294969638>)
> │    │  │  ├───23.30 MB (01.13%) ++ window(<anonymized-4294969597>)
> │    │  │  ├───23.07 MB (01.12%) ++ window(<anonymized-4294970214>)
> │    │  │  ├───23.03 MB (01.12%) ++ window(<anonymized-4294969981>)
> │    │  │  ├───22.78 MB (01.10%) ++ window(<anonymized-4294969930>)
> │    │  │  └───20.72 MB (01.00%) ++ window(<anonymized-4294969732>)
> │    │  └────2.41 MB (00.12%) -- ghost
> │    │       ├──1.39 MB (00.07%) ++ window(<anonymized-4294971142>)
> │    │       └──1.02 MB (00.05%) ++ window(<anonymized-4294971148>)

Your vsize is rather large, but that's probably because wasm is involved.

> 35,011.25 MB ── vsize
> 6,128.06 MB ── wasm-guard-pages

So the question is were addons disabled when you took this memory report?
Flags: needinfo?(erahm)
Flags: needinfo?(bullionareboy)
I seem to have managed to get a ghost window on (although I'm not seeing wasm). Andrew, is there any chance you could try to repro and do some GC/CC log digging?
Flags: needinfo?(continuation)
Whiteboard: [qf:investigate] → [qf:investigate][MemShrink]
Yup my addons were disabled. :erahm  

:mconley - ive sent a DM on twitter with a profile link, video and iirc(non anon) memory report. 
It might contain personal details so i haven't shared here  

I took another profile yesterday - - Gecko profiler seemed to indicate it had more data on this instance.  

I have another doubt if its because of standby/sleep. I leave Firefox running if i shut the lid or the system goes into standby when im away from ubuntu.
Flags: needinfo?(bullionareboy)
(In reply to Eric Rahm [:erahm] (please no mozreview requests) from comment #20)
> I seem to have managed to get a ghost window on (although
> I'm not seeing wasm). Andrew, is there any chance you could try to repro and
> do some GC/CC log digging?

What did you do on the site to trigger the ghost window? Did you log in, etc.? I browsed around a little bit on the site and didn't get one.
Flags: needinfo?(continuation) → needinfo?(erahm)
I believe I attempted to log in with github, realized that was going to be a pain w/ 2FA, cancelled, created a throw-away account and went through a few of the tutorials (up to learning about the <p> tag).
Flags: needinfo?(erahm)
Flags: needinfo?(continuation)
Another bit of info 

While i use freecodecamp, i also use codepen for running/testing code. 
Not long in the process my browser completely locks up 
The CPU usage looked normal but my RAM was maxed out ~96-98% usage of 4GB and ~53% usage of Swap partition (8GB total)  

Luckily i was able to crash the session properly via Terminal and here's a crash report if it helps
I'll try to repro again and gather cc logs.
Flags: needinfo?(erahm)
I'm not going to have to time to look at this soon. Sorry for the delay.
Flags: needinfo?(continuation)
Whiteboard: [qf:investigate][MemShrink] → [qf:investigate][MemShrink:P3]
(In reply to (Out 9/7 - 9/8) Eric Rahm [:erahm] (please no mozreview requests) from comment #25)
> I'll try to repro again and gather cc logs.

I can't seem to repro with the latest nightly.
Flags: needinfo?(erahm)
Keywords: perf
Priority: -- → P3
Summary: Firefox causing constant fan spin → Firefox causing constant fan spin with big pauses, and high GC/CC
There is also Bug 1373023 - [meta] Laggy text input on Twitter direct messages (we flush layout too often, and reflow is slow)
Closed: 2 years ago
Resolution: --- → INCOMPLETE
You need to log in before you can comment on or make changes to this bug.